Hello,
I have the following equation:
v1/v2 = R2/R1+R2
How do we solve for R2?
I don't know how to isolate R2 on one side of the equation. All help is appreciated?
thanks
[QUOTE=simplyComplex;773431]I have the following equation:
v1/v2 = R2/R1+R2
How do we solve for R2?/QUOTE]
Is it $\displaystyle \frac{v_1}{v_2}=\frac{R_2}{R_1+R_2}~?$
Because you actually posted $\displaystyle \frac{v_1}{v_2}=\frac{R_2}{R_1}+R_2$
Which is it?
If it is $\displaystyle \frac{v_1}{v_2}= \frac{R_2}{R_1+ R_2}$, start by multiplying both sides by $\displaystyle v_2(R_1+ R_2)$ to get $\displaystyle v_1(R_1+ R_2)= v_1R_1+ v_1R_2= v_2R_2$.
If it is $\displaystyle \frac{v_1}{v_2}= \frac{R_2}{R_1}+ R_2$, start by writing $\displaystyle R_2$ as $\displaystyle \frac{R_1R_2}{R_2}$ so you have $\displaystyle \frac{v_1}{v_2}= \frac{R_2}{R_1}+ \frac{R_1R_2}{R_1}= \frac{R_2+ R_1R_2}{R_1}$ and now multiply by $\displaystyle R_1v_2$.
Ooops I'm sorry.... Its:
v1/v2 = R2/(R1 + R2)
stop, you are going too fast for me!!!! If I start off with this:start by multiplying both sides by v2(R1 + R2) to get....
v1/v2 = R2/(R1 + R2)
so when you say cross multiply... do you mean like this:
(R1 + R2) (v1/v2) = (R2/(R1+R2)) (v2)
v1(R1 + R2) = R2v2
v1R1 + v1R2 = R2v2
So now, R2 is on both sides, what I really need is to isolate R2 on one side!!!!
So what is the next step?
thanks